Select correct statement(s) about macromolecular colloids.

(1) These molecules have dimensions, comparable to those or colloidal particles, their dispersions are called macromolecular colloids (size being less than 1 nm of small molecules)- True.(2) van der Waals' forces hold molecules together True(3) Gold sol, sulphur sol (S8) and other lyophilic sols belong to this True.